whoaahh... but Defold uses Box2D for 2D physics. Do you somehow map the 3D object in 2D space or do you have the ball's bounding box as a circle?
Viewing post in Running out of breakfast :)
I'm using 3d object in 2d world with 2d physics because when I use 3d physics, I had a such bug https://itch.io/post/257693
Yellow ball has a 1 shape sphere ; White ball - many shapes of sphere type